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also valid;

inputa a enables autodialing on input B

input t input A is the default input if not specified

inpc b

INPD D

5.2 Input Change State Level

The INLEVEL commands sets the active state of the input for triggering the auto-dialler.

For example, if the user requires triggering when the input is (going) closed (GND), then

the following message is sent by the master number:

INLEVEL CLOSED trigger when input A closed (GND/-VE)

or,

Inlevela negative trigger when input A closed (GND/-VE)

If the trigger is required when the input goes open the following message is sent:

INLEVELB OPEN trigger when input B open (+VE)

or,

Inlevelc positive trigger when input C open (+VE)

The input functions become inactive whilst the input remains in the active state (i.e. GND

for INLEVEL CLOSED/+V for INLEVEL OPEN) and remains inactive for 5 seconds after return-

ing to the idle state. INLEVEL BOTH allows triggering on either edge (no inactive state)

INLEVELD BOTH trigger input D on either edge

similarly;

INLEVELC C trigger when input C closed (GND)

INLD O trigger when input D open (+VE)

INL B trigger input A on either edge (BOTH)

By default changes will only be made to input A if not specified by the INLEVEL com-

mand.

When connecting the input to a volt free relay output the default settings (INLEVEL

CLOSED/NEGATIVE) are suitable for connection to NO/COM contacts. When connecting

to NC/COM (for example when connecting to a typical PIR detector) the input level

should be changed to:

Inlevelx open

This ensures the input triggers when the contact goes open-circuit.

When connecting to a typical open-collector burglar alarm output (eg. Bell outputs/

Strobe outputs/Set or unset outputs) then the default inlevel closed/negative settings

should be used. On some alarm panels the bell output is positive 12v when actuating the

alarm. In this case the inlevel positive/open command should be sent. A 1kohm resistor is

typically connected over the input to ground in this case to stop the alarm off voltage

‘floating’.

Advent Controls A5 User Manual

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